In Cycas, small specialized roots are associated with nitrogen-fixing microorganisms. Identify the name of these roots and their specific symbiotic partner.

Step-by-step solution

In gymnosperms, the roots are generally tap roots. In Cycas, small specialised roots called coralloid roots are associated with nitrogen-fixing cyanobacteria. In Pinus, the roots have a fungal association in the form of mycorrhiza. Root nodules with Rhizobium are found in leguminous angiosperms, and pneumatophores are respiratory roots found in mangrove plants like Rhizophora. Answer: Coralloid roots and cyanobacteria